CPR APPLICATIONS FOUNDATION · CHAPTER 12 · NORMAL
Normal Foundations of Infectious Disease
Organize the chapter before drilling into individual CPR concepts.
Supplemental foundation map: this page orients the detailed CPR Applications for Chapter 12. It is not part of the canonical CPR object inventory.
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Abnormal Foundations
Treatment Foundations
12.1 · SOURCE CPR FOUNDATION
Concept
Infectious disease is clinical microbiology applied to a patient. The key is connecting site, host risk, exposure, time course, and syndrome pattern to the likely pathogen class and safest next step. Step 1 rarely gives the organism first; it gives the context that should make the organism predictable.
Pattern
Step 1 infectious disease stems usually start with age, immune status, exposure, travel, sexual history, device use, hospitalization, animal contact, food exposure, or recent antibiotics. The task is to localize the syndrome, identify host vulnerability, and use exposure clues to narrow the pathogen and management step.
Rule
- Localize first. Decide where the infection is clinically occurring.
- Then identify host and exposure. Immune status and entry route determine which organisms matter.
- Then predict pathogen and management. Use site → host → exposure → syndrome → pathogen → management.
Applications
- Fever + cough after influenza → respiratory syndrome
- Fever + murmur + IV drug use → endovascular infection
- Fever + headache + neck stiffness → CNS infection
- Fever + diarrhea after travel → gastrointestinal infection
- Fever + dysuria + flank pain → urinary infection
- Fever with significant neutropenia → urgent evaluation and prompt empiric antimicrobial treatment according to risk and clinical setting
- Tip: Start with the patient pattern before naming the organism.
CPR APPLICATIONS · ACTIVE REASONING
Localize the infection and exposure
Make a prediction first. Each worked answer is available without JavaScript. These exercises do not save or send responses.
Worked reasoning and transfer
Best answer: Identify respiratory infection and host risk. Syndrome, acuity and comorbidities narrow likely organisms.
Transfer: What changes with severe hypoxemia?
Worked reasoning and transfer
Best answer: Endovascular infection including endocarditis. Persistent bacteremia and valve findings warrant evaluation.
Transfer: What does an implanted valve change?
Worked reasoning and transfer
Best answer: Urgency of infection assessment. Neutropenia increases vulnerability to invasive infection.
Transfer: How might microbial risk change with duration?
Explain it back: Write a causal chain for one decision, then identify which piece of evidence would change the answer.
Unscored teaching examples; not validated assessment items or patient-specific advice.
How to use this foundation map
- Identify the organizing mechanism.
- Recognize the pattern.
- Restate the rule without looking.
- Test transfer with applications and question practice.
Pair CPR with the 5P Approach™ when solving cases and questions.